Landing gears are a particulat headache, with some component parts being lifed at the same life as the total gear, yet being without an individual serial number.
You mention ETOPS; the requirements specify a minimum modification status for aircraft parts and systems. These are controlled through configuration management. AMOS has a Configuration Management Module, other systems may not, relying only on FIN Codes to ensure that the configuration is complete. It is then up to the operator to manage what parts and modification status qualify for a FIN Code, thus permitting the system to accept their installation on the aircraft. It is a headache that I've had to address, both when managing Technical Services and as Head of IT.There is no standard method for controlling lifed items or ETOPS configurations.
And don't mention AD compliance...
